1. Health
Send to a Friend via Email
You can opt-out at any time. Please refer to our privacy policy for contact information.



Definition: Abnormal contraction of the pupils, possibly due to irritation of the oculomotor system or paralysis of the dilators.
Common Misspellings: myosis
Examples: Miosis can occur as a symptom of cluster headache, a Migraine attack, stroke, or as an effect of some medications.

©2014 About.com. All rights reserved.